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[github/fretlink/terraform-provider-statuscake.git] / vendor / golang.org / x / crypto / openpgp / packet / literal.go
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1// Copyright 2011 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package packet
6
7import (
8 "encoding/binary"
9 "io"
10)
11
12// LiteralData represents an encrypted file. See RFC 4880, section 5.9.
13type LiteralData struct {
14 IsBinary bool
15 FileName string
16 Time uint32 // Unix epoch time. Either creation time or modification time. 0 means undefined.
17 Body io.Reader
18}
19
20// ForEyesOnly returns whether the contents of the LiteralData have been marked
21// as especially sensitive.
22func (l *LiteralData) ForEyesOnly() bool {
23 return l.FileName == "_CONSOLE"
24}
25
26func (l *LiteralData) parse(r io.Reader) (err error) {
27 var buf [256]byte
28
29 _, err = readFull(r, buf[:2])
30 if err != nil {
31 return
32 }
33
34 l.IsBinary = buf[0] == 'b'
35 fileNameLen := int(buf[1])
36
37 _, err = readFull(r, buf[:fileNameLen])
38 if err != nil {
39 return
40 }
41
42 l.FileName = string(buf[:fileNameLen])
43
44 _, err = readFull(r, buf[:4])
45 if err != nil {
46 return
47 }
48
49 l.Time = binary.BigEndian.Uint32(buf[:4])
50 l.Body = r
51 return
52}
53
54// SerializeLiteral serializes a literal data packet to w and returns a
55// WriteCloser to which the data itself can be written and which MUST be closed
56// on completion. The fileName is truncated to 255 bytes.
57func SerializeLiteral(w io.WriteCloser, isBinary bool, fileName string, time uint32) (plaintext io.WriteCloser, err error) {
58 var buf [4]byte
59 buf[0] = 't'
60 if isBinary {
61 buf[0] = 'b'
62 }
63 if len(fileName) > 255 {
64 fileName = fileName[:255]
65 }
66 buf[1] = byte(len(fileName))
67
68 inner, err := serializeStreamHeader(w, packetTypeLiteralData)
69 if err != nil {
70 return
71 }
72
73 _, err = inner.Write(buf[:2])
74 if err != nil {
75 return
76 }
77 _, err = inner.Write([]byte(fileName))
78 if err != nil {
79 return
80 }
81 binary.BigEndian.PutUint32(buf[:], time)
82 _, err = inner.Write(buf[:])
83 if err != nil {
84 return
85 }
86
87 plaintext = inner
88 return
89}